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Has any scientist or sci-fi writer proposed adding new variables to the Drake equation? Science in every area has progressed a great deal since the days of Enrico Fermi and his contemporaries, after all. Has there been a serious attempt to make an "updated" Drake equation? Maybe one that includes some basic social factors?

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    $\begingroup$ Have you looked at Wikipedia, by any chance? There's a decent subsection there on the topic. $\endgroup$ – HDE 226868 Apr 29 '20 at 14:20
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    $\begingroup$ Randall Munroe has proposed a new version of the equation with a new variable: xkcd.com/384 $\endgroup$ – The Square-Cube Law Apr 29 '20 at 14:26
  • $\begingroup$ @HDE226868 Great link! I wasn't familiar with any of these proposals. $\endgroup$ – Andrew Brēza Apr 29 '20 at 14:29
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    $\begingroup$ @Renan I'm a simple man. I see an XKCD link, I upvote. $\endgroup$ – Andrew Brēza Apr 29 '20 at 14:29
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    $\begingroup$ This reads more like a question about the possibility for extraterrestrial life in our galaxy, rather than a question about building fictional "worlds" where you can have as much or as little extraterrestrial life as you want. $\endgroup$ – sphennings Apr 29 '20 at 14:35